What does the RH Air Filter 508000806 vent connect to?

[donbrown]

Damaged the right airfilter intake (exhaust side) crarked the plastic.
The two tabs the filter screws onto have torn pretty good.
I think one is P/N 508000915

Air Duct Assembly. Includes 600 to 600d. Deep Black Models 508000915

What is the second "tab" part P/N the filter screen housing bolts onto?

 

[LoneViper]

Looks to me like it is the side air intake to the air box.